Cherry Red vs Dark Vermilion

How close are they?

ΔE 22.2, loose: different enough that you should pick on purpose. Dark Vermilion is a little darker, more muted, warmer than Cherry Red.

Can I use Dark Vermilion instead of Cherry Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Dark Vermilion is a little darker, more muted, warmer than Cherry Red.

Can I use Cherry Red instead of Dark Vermilion?

The same difference applies the other way round: Cherry Red is a little lighter, more saturated, cooler.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.